This list is in alphabetical order. Khan Academy is not included in this list due to the assumption that a “Flipped Classroom” and Kahn Academy go hand-in-hand.
http://www.techlearning.com/Default.aspx?tabid=67&entryid=6225
DawsonITE is a blog devoted to Educational Technology. It's compiled by Rafael Scapin, Coordinator of Educational Technology at Dawson College in Montreal (Canada).